Now would also be a good time to start setting up a loyalty program.
Get it in place now so you can start to get some experience and see how your customers respond to it. Take what you learn over the next three months and use that during the holiday season (e.g. "double the rewards points on Black Friday").
You could also use Repeat Customer Insights to help figure out your reward levels.
If you're using the amount spent as your reward basis, use the Monetary score and compare your 3s to your 4s and 5s.
If you're using the number of orders, look at Frequency (3 vs 4 and 5) or even the Latency report to find out what points tend to flip customers into the high-quality customers.
Learn which products build the best customers
Find which products create the most valuable customers with the First Product Analysis in Repeat Customer Insights. It goes beyond your best sellers by looking at long-term purchasing and retention behavior of your customers.